Main Components

The main components on the RDDRONE-T1ADAPT board are highlighted in the figure below and discussed briefly in the following sections.

TJA1101B (1)

The TJA1101B 100BASE-T1 automotive Ethernet PHY from NXP Semiconductors is used to support the automotive Ethernet (T1) side of the media converter. The TJA1101B offers 100 Mbit/s transmit and receive capability over up to at least 15 m of unshielded twisted pair (UTP) cable [1].

100BASE-TX PHY (2)

The 100BASE-TX Ethernet PHY supports the standard Ethernet side of the media converter.

LPC812 (3)

The ARM Cortex-M0+ micro is used to configure the two back-to-back PHYs and to control the master/slave behavior of the TJA1101B [2].

Debug connector (4)

This debug interface, illustrated in Figure 6, can be used to program the device. Since a physical connector is not mounted on the board, a cable such as the TC2050-ID-NL illustrated in Figure 7 can be used to interface with the board via the debug interface. Note that the board is designed for plug-and-play and does not need to be configured for evaluation purposes. The source code is available on request for users that need to adjust the configuration.

Note: While the interface accepts standard SWD debugger signals, this is not a standard JTAG/SWD pinout. UART signals have also been included for debugging purposes. A custom wiring or board adapter will need to be configured in order to connect to a traditional JTAG/SWD debugger. UM11602

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